Mark Landler reports in the New York Times on the “globalist vs. nationalist” divide within the Trump administration’s foreign policy and former White House chief strategist Steve Bannon’s contention that this ideological “chasm” “can’t be bridged.”

For some of Mr. Trump’s advisers, the key to understanding his statecraft is not how he deals with Mr. Xi or Ms. Merkel, but the ideological contest over America’s role that plays out daily between the West Wing and agencies like the State Department and the Pentagon.

“There’s a chasm that can’t be bridged between the globalists and the nationalists,” said Stephen K. Bannon, the president’s former chief strategist and the leader of the nationalist wing, who has kept Mr. Trump’s ear since leaving the White House last summer.

On the globalist side of the debate stand General McMaster; Secretary of Defense Jim Mattis; Secretary of State Rex W. Tillerson; and Mr. Trump’s chief economic adviser, Gary D. Cohn. On the nationalist side, in addition to Mr. Bannon, stand Stephen Miller, the president’s top domestic adviser, and Robert Lighthizer, the chief trade negotiator. On many days, the nationalist group includes the commander in chief himself.

The globalists have curbed some of Mr. Trump’s most radical impulses. He has yet to rip up the Iran nuclear deal, though he has refused to recertify it. He has reaffirmed the United States’ support for NATO, despite his objections about those members he believes are freeloading. And he has ordered thousands of additional American troops into Afghanistan, even after promising during the campaign to stay away from nation-building.